A. O. Smith AO-WH-FILTER
#1 in TankFull review
A certified, maintenance light tank for a small or medium home on chlorinated city water.
Amazon $399$399
The A. O. Smith AO-WH-FILTER is the better whole-house water filter overall, rated 3.6 to 3.2. The A. O. Smith AO-WH-FILTER leads on price, certification and running cost. The Aquasana Rhino Max Flow with UV wins on flow and warranty. The A. O. Smith AO-WH-FILTER costs $1,847.99 less ($399 vs $2,246.99).
Aquasana Rhino Max Flow with UV
#4 in TankFull review
For a large house that needs high flow and wants UV added. Most city homes can skip the UV and pay less.
Amazon $2,246.99$2,246.99
Prices were last checked November 2, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Which should you buy?
- Choose the A. O. Smith AO-WH-FILTER for price ($399 vs $2,246.99), certification (certified to NSF/ANSI 42 vs tested to NSF/ANSI 42, not certified) and running cost ($0.67 per 1,000 gallons ($399 every 600,000 gallons) vs $1.30 per 1,000 gallons ($1,299 every 1,000,000 gallons)).
- Choose the Aquasana Rhino Max Flow with UV for flow (14 gpm service flow vs 7 gpm service flow) and warranty (10-year warranty vs 6-year warranty).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every tank whole-house water filter; a clear win is highlighted. How we rank explains each one.
| Factor weight | A. O. Smith AO-WH-FILTER | Aquasana Rhino Max Flow with UV |
|---|---|---|
| Overall rating | 3.6/5 | 3.2/5 |
| Running cost 25% | 56 $0.67 per 1,000 gallons ($399 every 600,000 gallons) | 31 $1.30 per 1,000 gallons ($1,299 every 1,000,000 gallons) |
| Certification 25% | 60 certified to NSF/ANSI 42 | 30 tested to NSF/ANSI 42, not certified |
| Flow 15% | 20 7 gpm service flow | 90 14 gpm service flow |
| Price 20% | 100 $399 | 20 $2,246.99 |
| Warranty 15% | 56 6-year warranty | 100 10-year warranty |
Specifications
| A. O. Smith AO-WH-FILTER | Aquasana Rhino Max Flow with UV | |
|---|---|---|
| Filtration | ||
| Capacity | 600,000 gallons | 1,000,000 gallons |
| Replacement filters or media | $399 | $1,299 |
| Running cost | $0.67 per 1,000 gal | $1.30 per 1,000 gal |
| Stages | 1 | - |
| Certified | NSF/ANSI 42 | - |
| Tested to (not certified) | - | NSF/ANSI 42 |
| Chloramine | No | No |
| PFAS | No | No |
| Build | ||
| Flow | 7 gpm | 14 gpm |
| Ports | 0.8 in | - |
| Backwashing | No | No |
| UV stage | No | Yes |
| Warranty | 6 years | 10 years |